Watchmaker&#39;s tweezers.



H. E. HOLLOWAY.

WATGHMAKER'S TWBBZERS.

APPLICATION FILED MAY 17I 1913.

1,081,830. Patented Dec. 16, 1913.

WITNESSES INVENTOR ATTORNEYS COLUMBIA PILANOGRAPH (IO-,WASIIINGTON. U C

UNTTED STATE PATENT OFFICE.

HERBERT E. HOLLOWAY, OF TRENTON, NEW JERSEY.

\VATCHMAKERS TWEEZERS.

Application filed May 17, 1913.

2'29 all who 112 it may concern Be it known that I, Hnunuu'r E. Hormowar, a. citizen of the United States, and a resident of 'lrenton, in the county of Mercer and State of New Jersey, have invented a new and Improved lVatchrmikeNs Tweezers, of which the following is a full, clear, and exact description.

My invention relates to watchmakers tweezers, and has reference more particularly to tweezers used for placing the overcoil hair-spring in position in a watch.

When the hairspring of a watch is in position it should be perfectly flat. The ordinar.y flat hairspring is very easily adjusted in position while in the watch. The overcoil spring is not so easily adjusted into position and invariably has to he removed from the watch to give it the necessary bend to cause the main body of the spring to remain flat. Often this operation has to be repeated a number of times before the spring is in proper position. The reason the overcoil hairspring does not lie flat in a watch is because the overcoil is raised either too far or not far enough above the main body of the hair-spring; and it is with difficulty that the spring can be bent correctly with the ordinary tweezers without first removing the hairspring from the watch.

To overcome the necessity of taking out the overcoil hair-spring when placing the same in position, I have invented a pair of tweezers which have their clamping ends bifurcated, one side of which is so curved that when the bifurcated ends of the tweezers engage the overcoil end of the hail-spring in the watch, they cause the end of the spring to bend in the desired direction while the main portion of the hairspring remains flat in the atch.

The invention consists of the construction and combination of parts to be more fully described hereinafter and fully set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specifie; tion, in which like eha'acters indicate corresponding parts in all the views and in which:

Figure 1 is a plan view of an embodiment of my invention; Fig. 2 is a side elevation of same; Fig. 3 is a side elevation of the tweezers closed; Fig. 4 is a section on line 1%, Fig. 3, showing the bifurcated ex- Specification of Letters Patent.

Ilatented Dec. 16, .1913.

Serial No. 768,253.

tremities of the tweezers engaging the overcoil end of the hairspring; and Fig. 5 is a side elevation of a pair of tweezers for bending the (Wei-coil end of the spring in the opposite. direction from the same side of the watch.

Referring to the drawings, 6 and 7 represent the arms of the tweezers connected together at one end by means of rivets 8. The normal tendency of the arms 6 and 7 is to spread the noirriveted ends apart about the rivets as a fulcrum. These non-riveted ends are each provided with central slots 9 and 10 respectively dividing the end of the arm 6 into two portions or sides 11 and 12 and the end of the arm 7 into two portions or sides 13 and 14. The juxtaposed sides 11 and 13 of the arms 6 and 7 are bent or curved, as shown in Figs. 2 and 3, while the sides 12 and 1d of the bifurcated ends are flat and in plane with the inner surface of the arms 6 and 7 respectively. The sides 11 and 18 of the bifurcated ends are so bent that one fits snugly into the other; see Fig. 3.

In Fig. 5 the arms 6 and 7 have the sides 12 and 14. of the bifurcated ends curved, while the sides 1.1 and 13 are straight. This provision is to pcrnlit the bending of the over-coiled end of the hairspring in the direction opposite the one produced by the ends of the tweezer arms (5 and 7 shown in Figs. 1 to 3 inclusive.

The application of the tweezers is shown in Fig. 4-. While the sides 12 and 14 of the bifurcated ends of the arms 6 and 7 respectively maintain the portion of the hairspring 15 engaged therebetween flat, the ends 11 and 13 of the bifurcated ends of the arms 6 and 7 respectively causing the end of the spring engaged between them to be twisted, so to cause the stud attached to the extremity of the overcoiled end to descend to or rise from the main body of the spring. according to the type of tweezers used, that is, those shown in Figs. 1 to 3 inelusive or that shown in Fig. 5.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. Vatchmakers tweezers having their clamping ends bifurcated, each of said ends having one branch of the bifurcation flat and the other curved, substantially as and for the purpose set forth.

2. Vvatchmakers tweezers having their clamping ends bifurcated, each of said ends having one branch of the bifurcation Hat and the other branch curved, the curved branches of the two ends coacting with each other, substantially as and for the purpose set forth.

3. l vatchinakers tweezers having their clamping ends bifurcated, said bifurcations of each end having one of the facing 10 branches of the same curved so as to fit snugly one into the other, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HERBERT E. HOLLOWAY.

Witnesses RICHARD M. BELL WILLIAM J. HOLLOWAY.

monies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

